ﺿﺮﯾﺐ ﺍﻃﻤﯿﻨﺎﻥ Safety factor
ﺍﻟﻒ- ﺷﺎﺧﺺ ﺍﺳﺘﻘﺎﻣﺖ ﯾﮏ ﺳﺎﺧﺘﻤﺎﻥ ﺩﺭ ﺑﺮﺍﺑﺮ ﺷﮑﺴﺖ، ﮔﺴﯿﺨﺘﮕﯽ ﻧﺎﮔﻬﺎﻧﯽ) و ﯾﺎ ﻧﺎﭘﺎﯾﺪﺍﺭی (ﻣﯽﺑﺎﺷﺪ. ﺏ- ﻧﺴﺒﺖ ﺗﻨﺶ ﻧﻬﺎﯾﯽ ﺳﺎﺯﻩ ﺑﻪ ﺗﻨﺶ ﻣﺠﺎﺯ ﯾﺎ ﺗﻨﺶ وﺍﻗﻌﯽ ﺁﻥ.